(CommandList
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    (Pipeline
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        (BraceGroup
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            (SimpleCommand
              words: [{(cat)}]
              redirects: [
                (HereDoc
                  op_id: Redir_DLess
                  fd: 16777215
                  body: {('sayIt:\n') ('\t$(foreach b,$(BUILT_INS),echo XXX $(b:$X=) YYY;)\n')}
                  do_expansion: False
                  here_end: EOF
                  was_filled: T
                  spids: [9]
                )
              ]
            )
            (C {(cat)} {(Makefile)})
          ]
          spids: [4]
        )
        (SimpleCommand
          words: [{(make)} {(-f)} {(-)} {(sayIt)}]
          redirects: [(Redir op_id:Redir_Great fd:2 arg_word:{(/dev/null)} spids:[30])]
        )
        (C {(sed)} {(-n)} {(-e)} {(SQ <'s/.*XXX \\(.*\\) YYY.*/\\1/p'>)})
        (C {(sort)})
        (BraceGroup
          children: [
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              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:bad) op:Equal rhs:{(0)} spids:[54])]
              spids: [54]
            )
            (While
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              body: 
                (DoGroup
                  children: [
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
                          lhs: (LhsName name:base)
                          op: Equal
                          rhs: 
                            {
                              (CommandSubPart
                                command_list: 
                                  (CommandList
                                    children: [
                                      (C {(expr)} {(DQ ($ VSub_Name '$builtin'))} {(Lit_Other ':')} 
                                        {(SQ <'git-\\(.*\\)'>)}
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                                    ]
                                  )
                                left_token: <Left_CommandSub '$('>
                                spids: [69 81]
                              )
                            }
                          spids: [68]
                        )
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                      spids: [68]
                    )
                    (Assignment
                      keyword: Assign_None
                      pairs: [
                        (assign_pair
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                          op: Equal
                          rhs: 
                            {
                              (CommandSubPart
                                command_list: 
                                  (CommandList
                                    children: [
                                      (C {(sed)} {(-ne)} 
                                        {(SQ <'s/.*{ "'>) ($ VSub_Name '$base') 
                                          (SQ <'", \\(cmd_[^, ]*\\).*/'>) ($ VSub_Name '$base') (SQ <'\t\\1/p'>)
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                                left_token: <Left_CommandSub '$('>
                                spids: [85 103]
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                        )
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                    (If
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                                (DQ ($ VSub_Name '$base') 
                                  (' is builtin but not listed in git.c command list')
                                )
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                            )
                            (Assignment
                              keyword: Assign_None
                              pairs: [
                                (assign_pair
                                  lhs: (LhsName name:bad)
                                  op: Equal
                                  rhs: {(1)}
                                  spids: [128]
                                )
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                              spids: [128]
                            )
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                          spids: [16777215 117]
                        )
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                      spids: [16777215 132]
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                    (ForEach
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                      iter_words: [{(sh)} {(perl)} {(py)}]
                      do_arg_iter: F
                      body: 
                        (DoGroup
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                            (If
                              arms: [
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                                  cond: [
                                    (C {(test)} {(-f)} 
                                      {(DQ ($ VSub_Name '$builtin') (.) ($ VSub_Name '$sfx'))}
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                                  ]
                                  action: [
                                    (C {(echo)} 
                                      {
                                        (DQ ($ VSub_Name '$base') (' is builtin but ') 
                                          ($ VSub_Name '$builtin') (.) ($ VSub_Name '$sfx') (' still exists')
                                        )
                                      }
                                    )
                                    (Assignment
                                      keyword: Assign_None
                                      pairs: [
                                        (assign_pair
                                          lhs: (LhsName name:bad)
                                          op: Equal
                                          rhs: {(1)}
                                          spids: [179]
                                        )
                                      ]
                                      spids: [179]
                                    )
                                  ]
                                  spids: [16777215 164]
                                )
                              ]
                              spids: [16777215 183]
                            )
                          ]
                          spids: [148 186]
                        )
                      spids: [140 16777215]
                    )
                  ]
                  spids: [65 189]
                )
            )
            (ControlFlow token:<ControlFlow_Exit exit> arg_word:{($ VSub_Name '$bad')})
          ]
          spids: [51]
        )
      ]
      negated: F
    )
  ]
)